Li-ion Charge Time & C-Rate Calculator
From capacity and charge current, compute the C-rate plus theoretical and practical (efficiency-included) charge time, with the currents for 0.5C and 1C.
Key points
Li-ion Charge Time & C-Rate Calculator: From capacity and charge current, compute the C-rate plus theoretical and practical (efficiency-included) charge time, with the currents for 0.5C and 1C. Formula: t ≈ ΔSOC · capacity / charge current / efficiency. Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Full charge is detected when current tapers to about 0.05C, so the last 10% takes the longest; stopping at 80–90% saves roughly a third of the time. Charge current is also limited by the cell rating and temperature rise; 0.5C is the usual compromise between speed and life.
Inputs
t ≈ ΔSOC · capacity / charge current / efficiencyCalculation model (updates with parameters)
| C-rate | 0.20 C | C-rate = current / capacity; 1C means a one-hour charge |
| Charge to add | 2.000 Ah | 20% → 100% |
| Theoretical charge time | 240 minute | 4.00 h |
| Practical charge time | 282 minute | 含 85% 效率损失 |
| Currents for 0.5C / 1C | 1.25 A / 2.50 A | |
| Energy added | 7.40 Wh | 按nominal 3.7V 估算 |
Engineering notes
- Full charge is detected when current tapers to about 0.05C, so the last 10% takes the longest; stopping at 80–90% saves roughly a third of the time.
- Charge current is also limited by the cell rating and temperature rise; 0.5C is the usual compromise between speed and life.
FAQ
- What is Li-ion Charge Time & C-Rate Calculator for?
- From capacity and charge current, compute the C-rate plus theoretical and practical (efficiency-included) charge time, with the currents for 0.5C and 1C.
- What is the formula for Li-ion Charge Time & C-Rate Calculator?
- Core formula: t ≈ ΔSOC · capacity / charge current / efficiency. The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using Li-ion Charge Time & C-Rate Calculator?
- Full charge is detected when current tapers to about 0.05C, so the last 10% takes the longest; stopping at 80–90% saves roughly a third of the time. Charge current is also limited by the cell rating and temperature rise; 0.5C is the usual compromise between speed and life.